Stable long-term operation of superconducting current-feeder system for the LHD

Shuichi Yamada; Toshiyuki Mito; Ryuji Maekawa; Hirotaka Chikaraishi; Sadatomo Moriuchi; Toshio Uede; Hisaaki Hiue; Yasuo Yasukawa; Ikuo Itoh; Takashi Satow; Osamu Motojima

doi:10.1109/TASC.2002.1018647

Stable long-term operation of superconducting current-feeder system for the LHD

Shuichi Yamada
, Toshiyuki Mito
, Ryuji Maekawa
, Hirotaka Chikaraishi
, Sadatomo Moriuchi
, Toshio Uede
, Hisaaki Hiue
, Yasuo Yasukawa
, Ikuo Itoh
, Takashi Satow
, Osamu Motojima

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

Abstract

A superconducting (SC) current-feeder system is used as the current transmission lines for the experimental fusion device, LHD. It consists of nine flexible SC bus lines with total length of 497 m, and nine pairs of gas-cooled current leads. To avoid the propagation of the ice on the leads, the temperature of the terminals had been kept in the range between 5 and 20 degrees Celsius by the heaters. The measured voltage drops of all leads were less than 20 mV. The liquid helium levels of the leads and the sub-cooler tank will equalize by the siphon method. The total time of the coil excitations exceeds 3000 hours. We have demonstrated successfully that the SC current-feeder system was stable and easy to handle, and is useful for the SC experimental fusion device.

Original language	English
Pages (from-to)	1328-1331
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	12
Issue number	1
DOIs	https://doi.org/10.1109/TASC.2002.1018647
State	Published - Mar 2002
Externally published	Yes
Event	17th Annual Conference on Magnet Technology - Geneva, Switzerland Duration: Sep 24 2001 → Sep 28 2001

Keywords

Gas-cooled current leads
LHD
SC bus-line
SC current-feeder system
Stable long-term operation

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10.1109/TASC.2002.1018647

Cite this

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title = "Stable long-term operation of superconducting current-feeder system for the LHD",

abstract = "A superconducting (SC) current-feeder system is used as the current transmission lines for the experimental fusion device, LHD. It consists of nine flexible SC bus lines with total length of 497 m, and nine pairs of gas-cooled current leads. To avoid the propagation of the ice on the leads, the temperature of the terminals had been kept in the range between 5 and 20 degrees Celsius by the heaters. The measured voltage drops of all leads were less than 20 mV. The liquid helium levels of the leads and the sub-cooler tank will equalize by the siphon method. The total time of the coil excitations exceeds 3000 hours. We have demonstrated successfully that the SC current-feeder system was stable and easy to handle, and is useful for the SC experimental fusion device.",

keywords = "Gas-cooled current leads, LHD, SC bus-line, SC current-feeder system, Stable long-term operation",

author = "Shuichi Yamada and Toshiyuki Mito and Ryuji Maekawa and Hirotaka Chikaraishi and Sadatomo Moriuchi and Toshio Uede and Hisaaki Hiue and Yasuo Yasukawa and Ikuo Itoh and Takashi Satow and Osamu Motojima",

year = "2002",

month = mar,

doi = "10.1109/TASC.2002.1018647",

language = "English",

volume = "12",

pages = "1328--1331",

journal = "IEEE Transactions on Applied Superconductivity",

issn = "1051-8223",

publisher = "Institute of Electrical and Electronics Engineers",

number = "1",

note = "17th Annual Conference on Magnet Technology ; Conference date: 24-09-2001 Through 28-09-2001",

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TY - JOUR

T1 - Stable long-term operation of superconducting current-feeder system for the LHD

AU - Yamada, Shuichi

AU - Mito, Toshiyuki

AU - Maekawa, Ryuji

AU - Chikaraishi, Hirotaka

AU - Moriuchi, Sadatomo

AU - Uede, Toshio

AU - Hiue, Hisaaki

AU - Yasukawa, Yasuo

AU - Itoh, Ikuo

AU - Satow, Takashi

AU - Motojima, Osamu

PY - 2002/3

Y1 - 2002/3

N2 - A superconducting (SC) current-feeder system is used as the current transmission lines for the experimental fusion device, LHD. It consists of nine flexible SC bus lines with total length of 497 m, and nine pairs of gas-cooled current leads. To avoid the propagation of the ice on the leads, the temperature of the terminals had been kept in the range between 5 and 20 degrees Celsius by the heaters. The measured voltage drops of all leads were less than 20 mV. The liquid helium levels of the leads and the sub-cooler tank will equalize by the siphon method. The total time of the coil excitations exceeds 3000 hours. We have demonstrated successfully that the SC current-feeder system was stable and easy to handle, and is useful for the SC experimental fusion device.

AB - A superconducting (SC) current-feeder system is used as the current transmission lines for the experimental fusion device, LHD. It consists of nine flexible SC bus lines with total length of 497 m, and nine pairs of gas-cooled current leads. To avoid the propagation of the ice on the leads, the temperature of the terminals had been kept in the range between 5 and 20 degrees Celsius by the heaters. The measured voltage drops of all leads were less than 20 mV. The liquid helium levels of the leads and the sub-cooler tank will equalize by the siphon method. The total time of the coil excitations exceeds 3000 hours. We have demonstrated successfully that the SC current-feeder system was stable and easy to handle, and is useful for the SC experimental fusion device.

KW - Gas-cooled current leads

KW - LHD

KW - SC bus-line

KW - SC current-feeder system

KW - Stable long-term operation

UR - https://www.scopus.com/pages/publications/0036510072

U2 - 10.1109/TASC.2002.1018647

DO - 10.1109/TASC.2002.1018647

M3 - Conference article

AN - SCOPUS:0036510072

SN - 1051-8223

VL - 12

SP - 1328

EP - 1331

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 1

T2 - 17th Annual Conference on Magnet Technology

Y2 - 24 September 2001 through 28 September 2001

ER -

Stable long-term operation of superconducting current-feeder system for the LHD

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Keywords

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